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对鄂尔多斯盆地靖安油田长6油层组低渗透储层活性剂驱油效果及驱油效率的影响因素进行实验研究,为低渗透油田提高采收率提供科学依据。研究以真实砂岩微观模型渗流实验为主要手段。研究结果表明,研究区长6油层水驱油效率较高,平均可达40%以上。注入活性剂驱替后驱油效率有显著提高,驱油效率增量达9%~12%;注入倍数、驱替压力以及储层的非均质性是影响活性剂驱油效率的主要因素。
The influencing factors of flooding efficiency and flooding efficiency of low permeability reservoirs in Chang 6 reservoir of Jing’an Oilfield in Ordos Basin were studied, which provided a scientific basis for enhancing oil recovery in low permeability oilfield. The study is based on the real sandstone microscopic model seepage experiment as the main method. The results show that the waterflooding efficiency of Chang 6 Reservoir in study area is high, averaging over 40%. The flooding efficiency after flooding was significantly increased by 9% ~ 12%. The injection multiple, displacement pressure and reservoir heterogeneity were the main factors affecting the flooding efficiency of the active agent.